Preparing for Grad school

[AS95]

I need some advice. During my second semester of Sophomore year, I received D grade in Calculus II. My major is Computer Science. Also, my GPA went straight down from 3.30 to 3.02. 

 

The question is should I retake Calculus II or should I concentrate on the major computer science courses. I am also worried about not getting in a good grad school.

 

When should I start preparing for Grad School and what is the score that I should be aiming for??

[StatsG0d]

You should definitely retake it if you're set on doing CS grad school (or any kind of quantitative grad school really). Calc II is usually a prerequisite and I'm sure the admissions committees expect a strong grade in the class. You'll also need multivariable calculus and likely will need to get at least a C+ in order to advance onto that class. Good luck.

[AS95]

Thank you for the advice @footballman2399

[billrach]

Do CS grad schools really care about your calc 2 grade?  Calculus is rarely directly used in CS.